By calling them lemmings he wanted to call the attention for people that dont have original ideas to share.
Answer:
I belive it should be D, sorry if I'm wrong!
Explanation:
The fame of Hidesato's fortune spread far and wide, and as there was no need for him to spend money on rice or silk or firing, he became very rich and prosperous, and was henceforth known as My Lord Bag of Rice.